614 Records of the Indian Museum. [Voi,. VIII, 



Himalaya and H. damsangensis of Sikhim on one side, and diyung- 

 ensis of Assam a very close ally of H. catostoma on the other. 

 In these three species there is not a sign of a dart-sac, but the 

 genitalia however show marked differences. In H. damsangensis 

 the spermatheca is very long, with a globose termination carrying 

 no retractor muscle, and is bound to the oviduct. In the larger 

 Assam species {diyungensis) the same organ is solid, bulbous, 

 almost sessile, with a remarkably strong and lengthened retractor 

 muscle. The penis again of these two species could hardly be 

 more unlike. Compare text-fig. 4 C with text-fig. 7 A, in the first 

 there is a well-developed flagellum, in the second there is none 

 at all, while the retractor muscles are different in form and posi- 

 tion. 



In the formula of the respective radulas very considerable 

 diversity is found, the greatest departure being in that'of diyung- 

 ensis, the total number being far the highest. 



Landouria 



Mikiria 



In the " Records of the Indian Museum," Vol. VIII, Part VIII 

 (i9J^5), P- 537j Mr. H. B. Preston describes and figures Plectotropis 

 austeni, as from Upper Rotung, Abor Hills (5. W . Kemp) . I have 

 seen nothing so large as 12 mm. major diameter from that part or of 

 such a high spired form. L. aborensis which I describe is only 8 mm. 

 in major diameter. It is not stated how many specimens were sent 

 home nor is the museum number given or I could with this have 

 traced it to the tube it was in. The locality requires verification 

 — Clausilla insignis is recorded in this same contribution from 

 Kobo. In the interest of geographical distribution I must allude 

 to this for it certainly'' came from the Dawna Hills, and I have it 

 among species sent at the same time from the Amherst District of 

 Burma. Sarika concepta is also stated to be from Kobo, it was I 

 feel certain in the Dawna collection. Unfortunately shells from 

 the Abor Hills and Dawna Hills were packed in the same box. Mr. 

 Preston was with me at the time it was unpacked, when 3 or 4 

 glass tubes were found broken in transit, the scattered shells were 

 picked out as carefully as possible, but some mixing of specimens 

 was certain to result. 



Trachia ? dclibrata, Benson, var. fasciata, G.-A. 



Locality. — Kobo (5. W . Kemp). 



Shell with five bands below the broader supra-peripheral band 

 and one very fine one above that. 



Size: major diameter 21, minor 17, alt. axis 7J mm. 



